Step 6: Accept or refuse the null hypothesis? The confidence interval approach Using the probabil ity distribution of the test statistic, establish a 100(1-a)% confidence interval If this interval (the acceptance region) includes the null hypothesized value, do not reject the null hypothesis If this interval does not include it, reject the null hypothesis (2)The test of significance approach: - -Obtaining the relevant test statistic (e. g, the t statistic)under the null hypothesis and find out the probability of obtaining a specific value of the test statistic from the appropriate probability distribution The probability is less than the prechosen value of a, reject the null The probability is greater than a, do not reject If you do not want to preselect a, just present the p value of the statistic Note: Whether you choose the confidence interval or the test of significance approach, keep in mind that in rejecting or not rejecting a null hypothesis you are taking a chance of being wrong% of the timeStep 6: Accept or refuse the null hypothesis? (1)The confidence interval approach: ——Using the probability distribution of the test statistic, establish a 100(1-α)%confidence interval. If this interval (the acceptance region) includes the null￾hypothesized value, do not reject the null hypothesis. If this interval does not include it, reject the null hypothesis. (2)The test of significance approach: ——Obtaining the relevant test statistic (e.g., the t statistic) under the null hypothesis and find out the probability of obtaining a specific value of the test statistic from the appropriate probability distribution The probability is less than the prechosen value of α, reject the null hypothesis. The probability is greater than α, do not reject it. If you do not want to preselect α, just present the p value of the statistic. Note: Whether you choose the confidence interval or the test of significance approach, keep in mind that in rejecting or not rejecting a null hypothesis you are taking a chance of being wrongα% of the time